原因之一就是新技术，例如水力压裂法。
One reason is new technology, such as hydraulic fracturing, also known as fracking.
一些自然资源在我们周围，例如水和空气。
Some natural resources are around us, such as water and air.
认知不同类型的动物，例如水生动物，鸟类等。
Know different types of animals, such as water animal and bird.
认知不同类型的动物，例如水生动物，鸟类等。
Know different types of animals, such as water animal and bird.
应用推荐